Sorry I was really busy yesterday, but I found this spoiler..  Hope people like it!

Yahiko, Konan and Nagato decided to form a organization and fight with Konoha and Iwa Gakure.

Nagato : We decided Yahiko would be the leader,
then our organization became famous before we knew it.

The organization was so big Hanzou couldn’t ignore it.
Iwa, Konoha and Yahiko’s manage to have a ceasefire after years of battle.

That’s when Hell began.

Naruto 446 | Naruto 446 Spoiler
The one who awaited them at the place where the ceasefire was supposed to be negociated was Hanzou, who took Konan as a hostage, and Danzou from Konoha’s Anbu.
Konoha and Iwa agreed on a fake ceasefire to bait Yahiko and assassinate him.
Danzou expected his actions would make him a better candidate to the Hokage place.

Hanzou : If you don’t fight to kill eachother, this girls dies right here, right now !

Yahiko takes Nagato’s kunai and impales himself to save Konan

Yahiko : Konan, you must survive by any mean.
You’re the angel of this world.

Naruto 446 chapter | Naruto 446 raw
Then Yahiko takes Nagato’s hands and commit suicide.
Yahiko died, this was the second Pain
Where were supposed to have been matured, grow up …
This was exactly like when my parents died.

That’s when I realized that my answers were just bullshit.

Sidetext : Nagato’s awekening

Taken from http://spoilermanga.wordpress.com